I hear ya, we were stationed in Okinawa for a bit and that temp and humidity combo is killer. We didn't have to deal with the air pollution though, god that sounds horrible.
Are you guys waiting on visas or something else to finish up before heading to South America?
Cool that you've stockpiled a nice enough chunk of change to live off the divis, that's my plan too, just wish I would've started a long time ago :)